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Related Party Transactions (Details) (Laird Q. Cagan, USD $)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
May 06, 2005
Jun. 30, 2004
May 31, 2012
Common stock
Mar. 31, 2011
Common stock
Jun. 30, 2013
CMCP
May 26, 2004
CMCP
Oct. 31, 2009
CMCP
Common stock
Jun. 30, 2013
CMCP
High end of range
Jun. 30, 2013
CMCP
Low end of range
Related Party Transactions                  
Cash fees as a percentage of gross equity proceeds in private equity financings               8.00% 4.00%
Fixed warrant fee as a percentage of gross equity proceeds in private equity financings         4.00%        
Number of shares of common stock issued through a net cashless exercise of a placement warrant     65,261 58,350     119,795    
Number of shares of common stock that can be purchased against warrants, under the right to purchase 91,200 66,943       165,000      
Exercise price of warrants (in dollars per share) $ 2.50 $ 1.00       $ 1.00